I have a 4 1/2" arbotech woodcarver, its the version with 3 carbide teeth, it comes with a substantial guard assembly, i have used it a fair bit & its a pretty fearsome tool that demands respect. As a lifelong boatbuilder who has used some pretty ancient & probably illegal large woodworking machines the idea of a circ saw blade of any type on a grinder fills me with dread. Its a darwin award waiting to happen.